remove @show in coupling loop

[juliasloan25]

This if statement in the coupling loop is meant to print the date only on the first of the month, but it prints the date every day and at each timestep.

If we change the condition to have == instead of >=, the date will only get printed on the first of the month, but it will still get printed at each timestep that falls on that day (which is better, but maybe still not ideal):

        if cs.dates.date[1] == cs.dates.date1[1]
            @show(cs.dates.date[1])
        end

[juliasloan25]

Actually, this error was only coming up on my branch js/timemanager, which tests out the new ClimaUtilities.jl TimeManager module. The issue was coming from not correctly using the trigger_callback function defined there (I wasn't updating date1 with its return value)